1405879 has 2 divisors, whose sum is σ = 1405880. Its totient is φ = 1405878.

The previous prime is 1405841. The next prime is 1405919. The reversal of 1405879 is 9785041.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1405879 - 2⁷ = 1405751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702939 + 702940.

It is an arithmetic number, because the mean of its divisors is an integer number (702940).

2^1405879 is an apocalyptic number.

1405879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405879 is an equidigital number, since it uses as much as digits as its factorization.

1405879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1405879 is about 1185.6976849096. The cubic root of 1405879 is about 112.0252653460.

The spelling of 1405879 in words is "one million, four hundred five thousand, eight hundred seventy-nine".